Now showing items 1-3 of 3

    • Semantic query optimization: from DBMS to KBS 

      Blanco, J.M.; Illarramendi, A. (Universitat Politècnica de Catalunya. Departament de Llenguatges i Sistemes Informàtics, 1990)
      Conference report
      Open Access
      Although in the context of databases, the problem of semantic query optimization is well defined and many solutions has been proposed, this is not the case for knowledge base systems. Our goal in this paper is to present ...
    • Syntactic query processing: dealing with structure and time 

      Illarramendi, A.; Sbattella, L. (Universitat Politècnica de Catalunya. Departament de Llenguatges i Sistemes Informàtics, 1990)
      Conference report
      Open Access
      The present paper proposes new syntactical simplification opportuni­ties deriving from the presence in a query Language of constructa ex­plicitely referring to structural and temporal information. The paper refers to the ...
    • Use of an object-based system with reasoning capabilities to integrate relational databases 

      Goñi, A.; Illarramendi, A.; Blanco, J.M.; Mena, E. (Universitat Politècnica de Catalunya. Departament de Llenguatges i Sistemes Informàtics, 1994)
      Conference report
      Open Access
      The integration of heterogeneous and autonomous information sources is a requirement for the new type of cooperative information systems. In this paper we show the advantages of using a terminological system for integrating ...